Bhagavad Gita 17.25

17.25 Uttering ï1Tatï1, without aiming at the fruits, are the acts of sacrifice and austerity and the various acts of gifts performed by the seekers of liberation.

Without desiring fruitive results, one should perform various kinds of sacrifice, penance and charity with the word tat. The purpose of such transcendental activities is to get free from material entanglement.